A place like the Right Livers' Rest was bound to draw freaks, same as molasses draws flies. 1935, George Goodchild, chapter 5, in Death on the Centre Court: By one o'clock the place was choc-a-bloc.
Swallowing certain types of poisons may cause excessive salivation. According to the National Library of Medicine, pesticides can cause excessive saliva when they are swallowed. Venom from snake bites or insect stings is another type of poisoning that can cause the malady.
Higher centers in the central nervous system can also excite or inhibit the salivary nuclei. Lesions involving either the central nervous system or the oral cavity can cause excessive salivation as well. Diseases that affect the pharynx, esophagus, and stomach can also stimulate excessive production of saliva.